Improvement in low-water indicators for steam-boilers



0. B. KEN DALL. Low- W ater Indicator for Steam-B.niIers.

Patented Jan. 26, 1875.

rllllliNVENTOR Mmm WITNESSES cct k Attorneys THE GRAPHIC CO- PHCTD-UTK3534I PARK PLAC,N.Y.

-3 Sheets--Sheet.2.

0. B. KENDALL. Low-Water Indicator for Steam-Boi|ers'. N0,l59,184 Patentedlan.26,1875.

WITNESSES I Y INVENTOR M I WWda/x,

Attorneys THE 5 RAPHIC 'CDJHDTO Ll TREE-4| PARK PLACE, PLY- UNITED STATES PATENT OFFICE ORSON B. KENDALL, OF BUFFALO, NEW YORK.

IMPROVEMENT IN LOW-WATER INDICATORS FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 159,184, dated January 26, 1875; application filed December 16, 1874. v

To all whom it may concern:

Be it known that I, ORSON B. KENDALL, of

, Buffalo, in the county of Erie and in the State provement upon the Letters Patent for waterregulators for steam-boilers granted to me September 22,1874; and it consists in combining with the water-regulator therein shown a whistle, to form a lowwater alarm.

In order to enable others skilled in the art to which my invention appertains to make and use the same, 1 will now proceed to describe its construction and operation, referring to the annexed drawings, in which Figure 1 is a perspective view, showing my water-regulator and low-water alarm applied to a horizontal steam-boiler. Fig. 2 is an enlarged view of the water-regulator, alarm, and valve. Fig. 3 is a vertical section of the cylinder with interior float. Figs. 4 and 5 are sections of the valve.

A represents the cylinder, which is attached to the boiler in a manner and at a height which brings its center just to and parallel with the true water-level or water-line. At the top the steam-pipe O, and at the bottom the water-pipe B, connect the interior of the cylinder with the interior of the boiler, to supply it with both water and steam, allowing the water-level inside the cylinder A to exactl y correspond with that in the boiler. In-

a side of the cylinder A is a float, D, made of extra heavy plate, and its strength tested before being placed in position, to be more than doubly equal to any pressure it will be subjected to while in use. This float is balanced, or submerged in the water just to its center,

,so that its weight and buoying capacity are equal. The float is connected, by a rod or link, a, with one end of an arm or lever, E, which passes through the steam-chest, and is, at its other end, firmly secured on a shaft, 1),

passing horizontally through the outer end of When the float is down the valve H I is open, allowing the feed-water to pass through the pipe K into the boiler, and as the water rises in the boiler it rises also in the cylinder, carrying the float with it. The float, as it rises, elevates the arm E, turning the shaft 1) in its bearings, thus also turning the lever J, and, by means of the rods d (1, closing the valve H I. In like manner, when the float falls, the valve will be opened again. When the float gets to low-water mark and opens the valve the lever J, by an adjustable rod, 0, operates the whistle-lever L to open the valve in the whistle M, and thus sound the alarm for low water, the whistle being connected with the steam-space of the cylinder A. The lower end of the rod e has an elongated slot, 6, in which a pin on the lever J works, so that the whistle will not be sounded until the water gets down to the low-water mark.

The barrel H of the valve is, 011 one side, provided with the inlet 0, and on the opposite side is formed an outlet-chamber, I connected with the interior of the barrel by means of two openings or ports, h h, directly opposite each other. The plug I has two ports, 41 i, opposite each other, and may be turned so as to close the ports h h entirely, or let more or less water pass through, as required. The valve-plug I is made tapering, and the interior of the valve-chamber H made to correspond, the lower or inner end of the valve resting on an adjusting-screw,f, and held against the same by means of an adjusting-screw, f, whichv passes through a spring-arm, M, and bears against the end of the valve-stem 70, said spring-arm being attached to the stufling-box attached to the valve-barrel, and through which the valve-stem passes. On the end of the stem 7c the lever G is placed, and provided with the pointer R in the same manner as described in my former patent above referred to.

By setting the pointer R in difi'erent positions D, rod a, levers E and J rods 01 cl, and lever the water-line of the boiler may he changed G, the Whistle M, lever L, and rod 6, having as desired, to carry more or less Water. Thus loop 6, all substantially as set forth. the height of the water in the boiler may be In testimony that I claim the foregoing I safely and accurately changed to meet each have hereunto set my hand'and seal this 1st and every demand. day of December, 187 4.

Having thus fully described my invention, ORSON B. KENDALL. [L. s.] what I claim as new and desire to secure by Witnesses: Letters Patent, is- E. O. PATTISON,

In combination with the cylinder A, float O. E. KENDALL. 

